science & tech MCQ section 4 MCQ Questions & Answers Detailed Explanation

Answer: (a)

A fast reactor needs no moderator to slow down the neutrons at all, taking advantage of the fast neutrons producing a greater number of neutrons per fission than slow neutrons. For this reason ordinary liquid water, being a moderator as well as a neutron absorber, is an undesirable primary coolant for fast reactors.

Answer: (c)

Chandrayaan-1 was India’s first unmanned lunar probe. It was launched by the Indian Space Research Organisation in October 2008 and operated until August 2009.

The mission included a lunar orbiter and an impactor. India launched the spacecraft with a modified version of the PSLV, PSLV C11 on 22 October 2008 from Satish Dhawan Space Centre, Sriharikota, Nellore District, Andhra Pradesh.

Note: Chandrayaan-2 is India’s second lunar exploration mission after Chandrayaan-1.

Developed by the Indian Space Research Organization, the mission is planned to be launched to the Moon by a Geosynchronous Satellite Launch Vehicle. The ISRO is planning to launch Chandrayaan-2 in the first quarter of 2018.

Answer: (c)

Scientists at the University of Edinburgh’s School of Biological Sciences in the second week of January 2013 discovered that the oldest known super predator of the world was the Marine Crocodile.

Answer: (a)

Staphefekt is a new drug that does not contain the antibiotics

Answer: (b)

Baryon are sub-atomic particles. CERN scientists have recently discovered two new heavyweight subatomic particles belonging to the family of baryon

Answer: (b)

The Sarasis the first Indian multi-purpose civilian aircraft in the light transport aircraft category that has been developed in India. It was designed and developed by the National Aerospace Laboratories (NAL). The Saras made its maiden flight at the HAL airport in Bangalore on 29 May 2004.